Improvement in machines for skiving leather



1. P. EBOOKS.

Machine for Skiving Leather.

YNo. 108,687. Patented Oct. 25, 1870,*

- chant Sturt @anni ditta,

JOHN 1). onoons, on nornrntron, Assrenon To Aenonen n. nnAnKLIn, orne-wrok,v

MASSACHUSETTS, ASSIGNOR TO` LEONARD MORSE, OF. SAME PLAGE.

Leners 'Patent No. 108,687-, dated october 25, 1,870'.

I Mg-.

IMPROVEMENT IN MACHINES FOR SKIVING LEATHER..

The Schedule referred to in these Letters Patent and making part o the same. I

To all whom it may concern Beit known that I, JOHN P.,Gnoons, of Hopkinton, in the county of Middlesex and State of Massa,- ehusetts, have invented certain new and useful Improvements in Machinesfor Skiving Leather, of which the following 'is a full,'clcar, and exact description, reference being had to the accompanying drawing making part of this specification, in which- Figures 1 and 2 representopposite sectional elevations on the same central line;

`Figures 3 and L are opposite sides g Yand Figures 6 and 7 show different`=eleyations of detached lever connections, and the mode or means of connecting them with the lower cross-heads so as to give them a yielding action independent of each other, or so as to allow an independent yielding action of each of the lever connections.

This invention relates to machines which are used for skiving the curved-edges of boot-counters or stiffenings for boots and shoes, and has for its object to simplify the process and the machinery, and to cheapen the production, each curved edge of the-boot-counter or stif'ening being suitably skived by a single stroke of aknife carried\by the curved knife-carriage.

In the drawing- A A are two ends whiclrforlno the frame-work be tween which I arrange a driving-lever, B, pivoted at lits lower end to a shaft, G, on which itswings; above this .is a second shaft, passing through a hub, D, and on the inner end of this shaft is a cam, E.

This cam is provided with a pin or roller-stud, a, which operates in a groove, I), formed in the drivinglever.

, Qn the top of the ends A A are curved guides F and F', and between these guides I arrange a curved knife-carriage, G, furnished .with knives or cutters d,

set at an angle and secured by clamps e, and clamping-screws to hold the cutters in position, all as clearly shown in figs. 4 and 5.

Curved gauge-bars g are secured to the top of the knife-carriage, projecting beyond .one end of the latter and forward of the knives.

Above the curved guides F are curved clamps H, and beneath the guides are cross-heads I, connected with the clamps by rods or guides '0, and -both are movable vertically.

Above the cam-shaft,a11d at one sidcof themachine, a lever-shaft, i,'is arranged in suitable bearings k, and on this shaft I arrange three levers, L,

M, and M', the former to be actuated by thee-am E, and the two latter, for operating the cross-heads to draw down the clamps, by means of curved c'onnections N, each attached to the end of alevenMJnnd to the center of each cross-head where the upper-end of each connection worksin a socket, and is surrounded by a spiral spring, m, which provides for a yielding` action, as before described.

lThe forked llower end of the lever L contains a wheel or roller, n, to give it an. easier action on the rise of the cam.

A swivel-stud, E', depends from the lower side of the curved kni`e-carriage, and a similar stud rises from the top end of the driving-lever, and between these two studs is aconnecting-rod, P, pivoted to each of the latter. v

Springs S are arranged between the levers M 'and the lower side of'each curved guide F, to keep the former elevated and the clamps above the guides, while the roller n works on the smaller diameter of the cams E; when the larger diameter' of the cam reaches said roller the clamps are drawn downward to bind the leather inserted beneath them.

The revolving cam, and its roller-stud a, imparts motion tothe driving-lever B, and this imparts reciprocating motion to the knife-carriage; the clamps H rising at each backward motion. of p the latter, are drawn downward upon the curved-edged counter or stiifening placed beneath either of them, and their edges against the curved gauge-bars g, when, by the Aforwardmoti'on of the carriage, the knives' or cutters remove a portion of the edge of the leather, or`skive it at a single stroke, and in a superior manner.

The forward motion of the carriage and cutters is performed while the larger part' of the cam passes the roller a, and the backward motion is performed while the smaller portion of the cam passes the said roller and, when the latter motion is being performed, or at the end of the stroke, the leather is inserted beneath either clamp, and, being skived by the forward motion and by the cutters, is removed when the carriage recedes and other pieces inserted before the carriage advances, each piece being quickly inserted and withdrawn as the rapidly-moving carriage and cutters as rapidly perform their work; each part performing its intended function, and all the parts operating ii harmony together.

A wheel or pulley, F, on the outer end of the camshaft p, furnishes means for operating the machine.

At cach backward and forward motion of the knifecarriage the swivel-studs E move or turn slightly in theirrespective sockets, and this allows a curvilinear reciprocating motion of the carriage between the curved guidesF, andas the curved edges of bootcounters cr stiffenings are generally the same or on the same curve regardless of the size,V the curved knife-carriage properly constructed, and carrying its cutters on a curved line, as described, is adapted for skivingboot-counters or stiffeningsI of any standard size, and the yielding action of the lev'er connections N, caused by the spiral springs m., operating in the sockets of the crossdieads I, provides for inequalities ing or clamping thick or thin counters, wlieli the claim ps l", as described, :ind operated by :L cani, E, a. drivingin the thickness of the boot-countersinsertedbeneath the clamps H, and forward ot' the cutters,or for hold- :n'e drawn downward by the action of the levers and the operating cani.

I clgii n as my inventionl `1. `The curved knife-carriage G, provided with knives or cutters (1,-:ind curi-'ed gouge-bars y, and having a. rectilinearreciprocating motion between curved guides level', B, anda. connectingrod, P, pivoted 'to swivelstnds E', substantially in the manner :ind for the piirpore set forth.

2. 4Iircoinbinntion with the curved indie-carriage' operating :is described, the curved cl ein ps H, :ind crosshea-ds I, and yielding levcr-coniieciions, :is set forth, :i'niloperated by a com, E,Viind levers L :nid 5M, substantially in the marinier :nid for the purpose specified. i 3. 'llielever connections N, constructed as described, and combined with the cross-heads by yielding socketed springs m, in the manner and for the purpose set forth.

4. The cani E, constructed :is described, mid provided with a. pin or stud a, whereby it is adapted for operating the driving-Jever B, and the roller-lever L, and theirgspecificd connections, substantially :is described, and for the purpose specied.

5. The driving-lever B, constructed as described, with a. roller-groove, b, and provided with a. swivelstnd, E', :nid connected with the ends A bye. shaft, O, and with the curved knife-carriage, and operated by the cam E, in the manner and for the purpose specified.

6. The combination, substantially as described, of two branches or sets of operating elements, one branch consisting of the com E, lever B, swivel-studs E', connection l), and curved knife-carriage G, provided with ciittersand guides; the other branch or set ot' elements consisting of the ccm E, roller-lever L, levers M, connections N, cross-needs I, curved clamps H, :uid connections c, :ill arranged to ,effect the objects herein set forth. v i

JOHN P. (BROOKS. Witnesses:

STEPHEN F.. GATES, JOHN E. CRANE. 

